So true! And we're continuously persuaded to believe that lower taxes on the wealthy elites will cycle back into the economy through more jobs, better wages, etc. But the capitalists making all this money end up shoving it in bigger and bigger piggy banks--as you say, the problem is endemic to capitalism. And it's been accelerating at a disastrous pace over the past four decades -- the era of neoliberalism.
Great article, D.K.!